This discussion was so appreciated! Thank you @Emil , @benn0, @probhakar , @AnnMarieW , @sislvacl , @RenaudLN , @jizu, @Hikari , @Wabiloo , @malex30 , @HashRocketSyntax for the candid feedback.
I’m pleased to share that we are allowing multiple callbacks to target the same output in this PR! Add Patch callbacks by T4rk1n · Pull Request #2414 · plotly/dash · GitHub.
Another 
by our lead Dash developer @Philippe 